CVE-2026-15810

Cross-Site Scripting (XSS) in Looker allows Admin Account Takeover

HIGH

8.7

CVSS Score

Published: July 24, 2026 at 11:04 AM UTC

Updated: October 24, 2026 at 01:10 PM UTC

1 product affected across 1 vendorLooker

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Severity

HIGH8.7

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

Description

A Cross-Site Scripting (XSS) vulnerability in Google Cloud Looker versions prior to 25.6.103, 25.12.65, 25.18.68, 26.0.66, 26.2.47, 26.4.36, 26.6.28, and 26.8.7 on Looker-hosted and Self-hosted allows an attacker to execute arbitrary JavaScript leading to administrative account takeover using a maliciously crafted URL. Looker-hosted and Self-hosted were found to be vulnerable. This issue has already been mitigated for Looker-hosted instances. No user action is required for these. Self-hosted instances must be upgraded to the patched versions: 25.6.103+, 25.12.65+, 25.18.68+, 26.0.66+, 26.2.47+, 26.4.36+, 26.6.28+, or 26.8.7+.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Looker · Google Cloud

90%

0 ≤ v < 25.12.650 ≤ v < 25.18.680 ≤ v < 25.6.1030 ≤ v < 26.0.660 ≤ v < 26.2.470 ≤ v < 26.4.360 ≤ v < 26.6.280 ≤ v < 26.8.70

Affected range stops below 25.12.65, so it looks safe — our inference, not a vendor statement

Affected range stops below 25.18.68, so it looks safe — our inference, not a vendor statement

Affected range stops below 25.6.103, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.0.66, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.2.47, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.4.36, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.6.28, so it looks safe — our inference, not a vendor statement

Affected range stops below 26.8.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord

https://docs.cloud.google.com/support/bulletins#gcp-2026-049

Source: cverecord

https://docs.cloud.google.com/looker/docs/release-notes#July_22_2026

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHGoogleCloud

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-79

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